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Fix an error 51 with the Cisco VPN Client | Macworld One of the most-used programs on my Mac is the Cisco VPN Client, which is what I use to connect to Macworld’s VPN when posting articles such as this one. (OS X’s built-in VPN client also works Cisco VPN Client Error 51 - Open Your Firewall - Domain [ 2020-04-29 ] Learn from Donald Trump skills of handling the press (по-русски) Ideas [ 2020-04-22 ] Democratic Machiavellian disciple opens his cards (unwillingly) Ideas [ 2020-04-15 ] Obama/Hilary would like to know will Russian/Chinese leadership survive a nuclear strike and keep operating Ideas How to Fix Cisco VPN Client Error 51 – Unable to This article explains how to correct the Cisco VPN “Error 51” problem usually found on Apple Mac OS X. We provide full explanation of the problem and explain how A fix for 'Error 51' with the Cisco VPN Client - Mac OS X
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Windows and macOS computers both have an option to route all traffic over the VPN (default gateway). This is the default on Windows computers, but it has to be manually enabled on macOS computers using the Send all traffic through the VPN connection option in the System Preferences > Network > VPN L2TP > Advanced section. If you are intending to use a 'split tunneling' setup and disable the VPN Client FAQ - Cisco
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Oct 03, 2019 VPN not working after creators update 1709 Apr 20, 2018 Cisco Vpn Client Error 51 : Unable to communicate with the